화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Materials Research, Vol.11, No.6, 472-476, June, 2001
Export Citation
X%C-5%Cr-5%V -5%Mo-5%W-5%Co 다합금계백주철의 응고조직에 관한 연구
The Solidification Microstructure of X%C-5%Cr-5%V-5%Mo-5%W-5%Co Multi-Component White Cast Iron
류성곤, 마쯔바라 야스히로1
  • 계명대학교 공과대학 재료공학과
  • 1일본 쿠루메공대 금속재료공학과
Sung-Kon Yu, and Yasuhiro Matsubara1
  • Dept. of Materials Eng., Keimyung University, Taegu, Korea
  • 1Dept. of Metallurgical and Materials Eng., Kurume National College of Technology, Japan
초록
광학 및 주사전자현미경을 사용하여 X%C-5%Cr-5%V-5%Mo-5%W-5%Co 조성을 가진 다합금계백주철에서 정출되는 탄화물의 종류 및 형태를 3차원적으로 관찰하였는 바 MC, MC 및 MC의 3종류의 탄화물이 정출되었다. MC탄화물은 꽃잎, 구상 그리고 산호초형태의 3종류, MC탄화물은 층상 및 판상의 2종류, MC7탄화물은 고크롬백주철에서 관찰되는 막대형태의 한 종류만 관찰되었다. 첨가한 합금원소중 Co는 기지조직에만 고용되었기 때문에 탄화물의 현상에는 영향을 미치지 않았다.
Type and three-dimensional morphology of carbides precipitated in the X(X= 1.70, 1.92, 2.21, 2.50, 2.86)%C-5%Cr-5%V-5%Mo-5%W-5%Co multi-component white cast iron were investigated using an optical microscope and SEM. The types of carbides precipitated were MC, MC and MC. Morphology of the MC carbide took three forms, that it petal-like, nodular and coral-like. MC carbide seemed to change its morphology from petal-like through nodular, and finally to coral-like with an increase in carbon content. M7C carbide was classified into lamellar and plate-like type. The lamellar MC arbide precipitated in the iron with low molybdenum and tungsten contents, and higher contents of both elements in the iron were needed to form the plate-like MC carbide. The morphology of MC was rod-like similar to that observed in high chromium white cast iron. However, cobalt does not affect the type and morphology of precipitated carbides.
Keywords:multi-component white cast iron;MC;C and carbide;morphology
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